Khan/khan-exercises — Issue #7511: Functions 3 - functions 3
Author: KhanBugz
Created: 2011-12-02 00:39:19+00:00
State: open
Labels: chrome, wrong-or-unclear, xp

Reporter: erikasier92@yahoo.com

g(x)=1
2
h(n)= -n - n + 5(g(n))

g(h(4))=?
this is one of the practice section excersises, and on the third step, it says in the
2
explanation that h(4)= -4 -4 +(5)(1) equals -15...mistake!!!!
negative 4 squared equals 16...not negative 16..therefore the rest of the excersise is wrong, thus the result cannot be -15

[functions_3.html?seed=145&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/functions_3.html?seed=145&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/functions_3.html?seed=145&problem=0&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%2268%5C%22%22%2C172%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%5D)

["68"]

Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.121 Safari/535.2

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